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Answer to Question #61439 in Other Biology for umar

Question #61439

7 Sweat glands in the ______________ cool body on hot days.
hairs
legs
head
skin
8 Lungs enable mammals to use atmospheric _____________.
nitrogen
carbon
carbon dioxide
oxygen
9 A rigid exoskeleton is a characteristic of the phylum __________________
mammalia
arthropda
chordata
pisces
Expert's answer
7. skin
8. oxygen
9. arthropoda

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